title: Superconductivity in highly disordered dense carbon disulfide.
abstract: High pressure plays an increasingly important role in both understanding superconductivity and the development of new superconducting materials. New superconductors were found in metallic and metal oxide systems at high pressure. However, because of the filled close-shell configuration, the superconductivity in molecular systems has been limited to charge-transferred salts and metal-doped carbon species with relatively low superconducting transition temperatures. Here, we report the low-temperature superconducting phase observed in diamagnetic carbon disulfide under high pressure. The superconductivity arises from a highly disordered extended state (CS4 phase or phase III[CS4]) at ~6.2 K over a broad pressure range from 50 to 172 GPa. Based on the X-ray scattering data, we suggest that the local structural change from a tetrahedral to an octahedral configuration is responsible for the observed superconductivity.
authors.affiliation: Departments of Physics and Chemistry, Institute for Shock Physics, Washington State University, Pullman, WA 99164, USA.
authors.forename: Ranga P
authors.initials: RP
authors.lastname: Dias
authors.forename: Choong-Shik
authors.initials: CS
authors.lastname: Yoo
authors.forename: Viktor V
authors.initials: VV
authors.lastname: Struzhkin
authors.forename: Minseob
authors.initials: M
authors.lastname: Kim
authors.forename: Takaki
authors.initials: T
authors.lastname: Muramatsu
authors.forename: Takahiro
authors.initials: T
authors.lastname: Matsuoka
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ohishi
authors.forename: Stanislav
authors.initials: S
authors.lastname: Sinogeikin
mesh_terms: D002246:Carbon Disulfide / Q000737:chemistry*; D004553:Electric Conductivity; D008968:Molecular Conformation; D011312:Pressure; D012542:Scattering, Radiation; D013696:Temperature
chemical_list: D002246:Carbon Disulfide
keywords: extended solids; magnetic ordering; metallization; non-Fermi liquids; nonconventional superconductors